TY - RPRT TI - ULFEM time series analysis package AU - Susan M. Karl AU - Darcy McPhee AU - Jonathan M. G. Glen AU - Simon L. Klemperer PY - 2013 DO - 10.3133/ofr20131285 UR - https://pubs.usgs.gov/publication/ofr20131285 ID - ofr20131285 ER -